EP1122904A2 - Noeud d'accès pour réseaux optiques avec longueurs d'ondes d'accès variables - Google Patents

Noeud d'accès pour réseaux optiques avec longueurs d'ondes d'accès variables Download PDF

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Publication number
EP1122904A2
EP1122904A2 EP01100608A EP01100608A EP1122904A2 EP 1122904 A2 EP1122904 A2 EP 1122904A2 EP 01100608 A EP01100608 A EP 01100608A EP 01100608 A EP01100608 A EP 01100608A EP 1122904 A2 EP1122904 A2 EP 1122904A2
Authority
EP
European Patent Office
Prior art keywords
access node
light
optical
user devices
wavelengths
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01100608A
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German (de)
English (en)
Other versions
EP1122904A3 (fr
Inventor
Mathias Dr. Bischoff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1122904A2 publication Critical patent/EP1122904A2/fr
Publication of EP1122904A3 publication Critical patent/EP1122904A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

Definitions

  • Access nodes for optical networks with variable access wavelengths User device for connection to such an access node, Method for feeding several signals of multiple users in an optical network and using one Access node and at least one user device Implementation of such a procedure.
  • the invention is concerned with an access node for optical Networks with variable access wavelengths, one user device for connection to such an access node, a method for feeding in multiple signals from multiple users into an optical network and the use of an access node and at least one user device for implementation of such a procedure.
  • Tunable light sources are required for this, whose wavelength can be changed.
  • transponders These are devices that have any input wavelength implement a fixed output wavelength, usually first convert the signal to baseband and this signal then the output wavelength again is modulated. This means that the user of the send optical network on any wavelength can.
  • this known solution has the major disadvantage that a separate transponder for each user in the access node is required. As a result, network access is only possible by applying of considerable costs.
  • the risk that the transponder Signal quality deteriorated This is particularly the case with designs the case that only reinforce in the baseband or with Limiters work.
  • there are known ones Solutions the danger that not all signal formats are processed can be. This is particularly the case with versions of the Case that make a complete regeneration in the baseband.
  • the object of the invention is therefore, access nodes, user devices and a method for feeding several signals available to multiple users in an optical network who do not have the above problems.
  • an access node it is provided that the required light sources with the different wavelengths are arranged in this itself and no longer in the individual user devices. This makes it unnecessary for everyone Provide users in the access node with a transponder. Likewise it is not necessary to have line cards in the user devices exchange because the respective wavelength in the access node is generated and from there to the individual user devices is transmitted. Furthermore, the operator of the optical Network through an access node according to the invention full control over all light sources in its network. He is thus able to easily maintain the frequency constancy and the power level of the light signals in its network to deliver.
  • the spatial proximity of the light sources enables in addition, the division of expensive monitoring equipment, such as optical spectrum analyzers, among all Swell.
  • the single figure shows a schematic representation of a Access node with user devices connected to an optical network connected.
  • the optical access node 10 has n light sources 11.1-11.n where n is greater than or equal to the number of different ones Is wavelengths used in the optical network.
  • the wavelengths of these light sources 11.1-11.n are identical with the wavelengths used in the optical network. Because the light sources are spatially close together, namely in the access node 10 and not for every user, can preferably be used laser arrays that oppose Single lasers are cheaper and in their emission wavelengths already on the channel division of the wavelength division multiplex can be manufactured in a coordinated manner.
  • the principle conceivable use of laser arrays related Transponders fail due to the space requirement of the baseband electronics, which fills an entire card. In order to it is necessary to have each transponder card with a separate one To equip lasers. Because the present invention is based on baseband electronics waived is such a limitation unavailable.
  • a switching matrix 12 connects to the light sources 11.1-11.n. on. K First circulators are connected to the switching matrix 12 13.1-13.k, which are arranged in parallel lines.
  • the first circulators 13.1-13.k are first light guides via k 3.1-3.k, which are led out of the access node 10, connected to the user devices 2.1-2.k.
  • Within the access node 10 follows the first circulators 13.1-13.k a second switching matrix 14.
  • the second switching matrix 14 is via k connections 15.1-15.k with a signal processing block 16 connected. From signal processing block 16 starting from the second light guide 4.1-4.m are from the access node 10 led out with the optical network (not shown) are connected.
  • the access node 10 Via the first light guide 3.1-3.k with the access node 10 connected user devices 2.1-2.k each have one second circulator 21.1-21.k and a modulator 22.1-22.k on.
  • the modulators 22.1-22.k are each with an information source 23.1-23.k connected.
  • a method according to the invention for feeding several Signals from several users in an optical network also run the device described above as follows:
  • the light sources 11.1-11.n of the optical access node 10 there is a generation 1 of different light signals Wavelengths. Act at these wavelengths used in the optical network as described above Wavelengths.
  • the number corresponds n of the light sources 11.1-11.n exactly the number of wavelengths of wavelength division multiplex, i.e. the number of optical Channels per light guide.
  • the n unmodulated light signals from the light sources 11.1-11.n become the first switching matrix 12 supplied.
  • the first switching matrix 12 routes this Light signals to the k first circulators 13.1-13.k accordingly the assignment of the individual wavelengths.
  • the unmodulated are in the individual user devices 2.1-2.k.
  • Light signals on the second circulators 21.1-21.k on the respective modulator 22.1-22.k forwarded.
  • the modulators 22.1-22.k there is a modulation 4 of these Light signals according to the information from the information sources 23.1-23.k passed on to the modulators 22.1-22.k become.
  • the now modulated light signals are in turn back in via the same first light guides 3.1-3.k.
  • the access node 10 transmit, which is a coupling 5 in corresponds to the access node 10.
  • the second circulators 21.1-21.k and the modulators 22.1-22.k can also reflection modulators are used.
  • first circulators 13.1-13.k can also use directional couplers become.
  • Such directional couplers are preferably used which are designed as fiber directional couplers.
  • the second switching matrix 14 the light signals according to their wavelengths ordered and then over the connections 15.1-15.k for further processing to the signal processing block 16 forwarded.
  • This signal processing block 16 contains at least wavelength division multiplexer. But he can do the same good also additional switching fields, optical switches, optical Amplifiers, optical monitoring devices and / or other signal processing units included. If the Signal processing block 16 contains a further switching matrix, this is advantageously done with the second switching matrix 14 summarized. In this case, the connections are omitted 15.1-15.k. Generation occurs in the wave multiplexers 6 of wavelength division multiplex signals.
  • the signal processing block 16 transmits those produced in it Wavelength division multiplex signals on the second light guide 4.1-4.m, resulting in a feed 7 into the optical Network leads. If only a single second light guide 4.1 the signal processing block 16 with the optical network connects, there is one terminal multiplexer, with two second Optical fibers 4.1, 4.2 an add / drop multiplexer and for more than two second light guides 4.1-4.m an optical cross-connect. If there is more than one second light guide 4.1-4.m the possibility, instead of a number m each of light sources 11.1-11.n a wavelength less Number of light sources 11.1-11.n to be provided, and this Light sources 11.1-11.n under several user devices 2.1-2.k to share.
  • the first switching matrix 12 must be multicast-capable be carried out.
  • a wavelength more than m light sources 11.1-11.n it is also possible to for a wavelength more than m light sources 11.1-11.n to be provided to 11.1-11.n to a redundant light source 11.1-11.n of the same wavelength to be able to fall back on.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Optical Communication System (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
EP01100608A 2000-02-01 2001-01-10 Noeud d'accès pour réseaux optiques avec longueurs d'ondes d'accès variables Withdrawn EP1122904A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10004290A DE10004290B4 (de) 2000-02-01 2000-02-01 Access-Knoten für optische Netze mit variablen Access-Wellenlängen, Nutzergerät zum Anschluss an einen solchen Access-Knoten, Verfahren zum Einspeisen von mehreren Signalen von mehreren Nutzern in ein optisches Netz und Verwendung eines Access-Knotens und mindestens eines Nutzergeräts zur Durchführung eines solchen Verfahrens
DE10004290 2000-02-01

Publications (2)

Publication Number Publication Date
EP1122904A2 true EP1122904A2 (fr) 2001-08-08
EP1122904A3 EP1122904A3 (fr) 2005-07-27

Family

ID=7629415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01100608A Withdrawn EP1122904A3 (fr) 2000-02-01 2001-01-10 Noeud d'accès pour réseaux optiques avec longueurs d'ondes d'accès variables

Country Status (3)

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US (1) US7013086B2 (fr)
EP (1) EP1122904A3 (fr)
DE (1) DE10004290B4 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2371431A (en) * 2001-01-20 2002-07-24 Marconi Comm Ltd Optical switch positioned between multi-wavelenth light sources and a plurality of modulators
FR2838568B1 (fr) * 2002-04-11 2004-06-18 Cit Alcatel Generateur de signaux optiques porteurs de donnees et de longueurs d'onde porteuses selectionnables
WO2011061742A2 (fr) * 2009-11-18 2011-05-26 Yissum Research Development Company Of The Hebrew University Of Jerusalem, Ltd. Système de communication et procédé de gestion de transfert de données par l'intermédiaire d'un réseau de communication
EP3416316B1 (fr) * 2017-06-14 2019-09-25 Nokia Solutions and Networks Oy Carte de ligne optique et émetteur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422219A1 (de) * 1984-06-15 1985-12-19 Standard Elektrik Lorenz Ag, 7000 Stuttgart Optisches nachrichtenuebertragungssystem im teilnehmeranschlussbereich
DE3629535A1 (de) * 1985-09-03 1987-03-12 Int Standard Electric Corp Kohaerentes optisches frequenzmultiplex-nachrichtenuebertragungssystem
DE19734957C1 (de) * 1997-08-13 1998-12-24 Lucent Tech Network Sys Gmbh Verfahren und Anordnung zur Wellenlängenstabilisierung für mehrkanalige optische Übertragungssysteme
EP1024541A2 (fr) * 1999-01-28 2000-08-02 NEC Corporation Source de lumière pour l'émission de lumière de longueurs d'ondes différentes et émetteur optique l'utilisant
EP1039670A2 (fr) * 1999-03-22 2000-09-27 Lucent Technologies Inc. Système à multiplexage en longueurs d'ondes pour anneaux optiques

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Publication number Priority date Publication date Assignee Title
DE69530803D1 (de) * 1994-02-17 2003-06-26 Toshiba Kawasaki Kk Optisches Wellenlängenmultiplex Netzwerk
US5870216A (en) * 1995-10-26 1999-02-09 Trw Inc. Splitterless optical broadcast switch
JPH1079705A (ja) * 1996-09-03 1998-03-24 Fujitsu Ltd 光変調装置及び光変調方法
JP3042605B2 (ja) * 1997-02-14 2000-05-15 日本電気株式会社 光送信器
JP3930952B2 (ja) * 1997-10-20 2007-06-13 富士通株式会社 光クロスコネクト装置，光挿入分岐装置および光源装置
US6275511B1 (en) * 1998-07-13 2001-08-14 E-Tek Dynamics Overlapping multiple fiber Bragg gratings
US6535313B1 (en) * 1998-10-16 2003-03-18 Lucent Technologies Inc. Dynamically assignable optical signal access control apparatus
DE69942014D1 (de) * 1998-12-08 2010-03-25 Nippon Telegraph & Telephone Optisches Kommunikationsnetz

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422219A1 (de) * 1984-06-15 1985-12-19 Standard Elektrik Lorenz Ag, 7000 Stuttgart Optisches nachrichtenuebertragungssystem im teilnehmeranschlussbereich
DE3629535A1 (de) * 1985-09-03 1987-03-12 Int Standard Electric Corp Kohaerentes optisches frequenzmultiplex-nachrichtenuebertragungssystem
DE19734957C1 (de) * 1997-08-13 1998-12-24 Lucent Tech Network Sys Gmbh Verfahren und Anordnung zur Wellenlängenstabilisierung für mehrkanalige optische Übertragungssysteme
EP1024541A2 (fr) * 1999-01-28 2000-08-02 NEC Corporation Source de lumière pour l'émission de lumière de longueurs d'ondes différentes et émetteur optique l'utilisant
EP1039670A2 (fr) * 1999-03-22 2000-09-27 Lucent Technologies Inc. Système à multiplexage en longueurs d'ondes pour anneaux optiques

Also Published As

Publication number Publication date
DE10004290A1 (de) 2001-08-09
EP1122904A3 (fr) 2005-07-27
DE10004290B4 (de) 2004-01-29
US20010013963A1 (en) 2001-08-16
US7013086B2 (en) 2006-03-14

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